Given the STATEMENT about ...., decide whether it is TRUE or FALSE for an ELEMENT, COMPOUND or MIXTURE [8f-1]

STATEMENT about ....

ELEMENT

COMPOUND

MIXTURE

has a fixed melting point?

true or false?

true or false?

true or false?

true, true, false

true, false, false

false, false, true

false, true, true

Given the STATEMENT about ...., decide whether it is TRUE or FALSE for an ELEMENT, COMPOUND or MIXTURE [8f-2]

STATEMENT about ....

ELEMENT

COMPOUND

MIXTURE

has only one type of atom?

true or false?

true or false?

true or false?

true, true, false

true, false, false

false, false, true

false, true, true

Given the STATEMENT about ...., decide whether it is TRUE or FALSE for an ELEMENT, COMPOUND or MIXTURE [8f-3]

STATEMENT about ....

ELEMENT

COMPOUND

MIXTURE

always has the same composition?

true or false?

true or false?

true or false?

false, true, true

true, false, false

true, true, false

false, false, true

Given the STATEMENT about ...., decide whether it is TRUE or FALSE for an ELEMENT, COMPOUND or MIXTURE [8f-4]

STATEMENT about ....

ELEMENT

COMPOUND

MIXTURE

has a definite chemical symbol or formula?

true or false?

true or false?

true or false?

false, false, true

true, false, true

false, true, false

true, true, false

Given the STATEMENT about ...., decide whether it is TRUE or FALSE for an ELEMENT, COMPOUND or MIXTURE [8f-5]

STATEMENT about ....

ELEMENT

COMPOUND

MIXTURE

has no fixed boiling point?

true or false?

true or false?

true or false?

false, false, true

true, false, true

false, true, false

true, true, false

Given the STATEMENT about ...., decide whether it is TRUE or FALSE for an ELEMENT, COMPOUND or MIXTURE [8f-6]

STATEMENT about ....

ELEMENT

COMPOUND

MIXTURE

is easily separated into different substances?

true or false?

true or false?

true or false?

false, true, true

false, false, true

true, true, false

true, false, false

Given the STATEMENT about ...., decide whether it is TRUE or FALSE for an ELEMENT, COMPOUND or MIXTURE [8f-7]

STATEMENT about ....

ELEMENT

COMPOUND

MIXTURE

has more than one type of atom?

true or false?

true or false?

true or false?

true, true, false

false, false, true

false, true, true

true, false, false

Given the STATEMENT about ...., decide whether it is TRUE or FALSE for an ELEMENT, COMPOUND or MIXTURE [8f-8]

STATEMENT about ....

ELEMENT

COMPOUND

MIXTURE

there are only about 100 of them?

true or false?

true or false?

true or false?

true, true, false

false, false, true

false, true, true

true, false, false

/What is the formula of the molecule? [8f-9]

C2H6O

2C6HO

C3H6

C6H2O

What is the formula of the molecule? [8f-10]

C5H6I2

C3H6Cl2

C6H3Cl2

C2H6Cl3

What is the formula of the molecule? [8f-11]

C8H3

3C8H

C3H8

C3H6

What is the formula of the molecule? [8f-12]

C2H6O3

3C6H2O

C5H6O

C3H6O2

When some salt is dissolved in plenty of water, which statement is most likely TRUE about the resulting solution? [8f-13]

the boiling point is higher than pure water

the freezing point is higher than pure water

the boiling point decreases the longer the solution is boiled

the solution becomes less concentrated the longer it is boiled

When some salt is dissolved in plenty of water, which statement is most likely TRUE about the resulting solution? [8f-14]

the boiling point is lower than pure water

the freezing point is lower than pure water

the boiling point decreases the longer the solution is boiled

the solution becomes less concentrated the longer it is boiled

When some salt is dissolved in plenty of water, which statement is most likely TRUE about the resulting solution? [8f-15]

the boiling point is lower than pure water

the freezing point is higher than pure water

the boiling point increases the longer the solution is boiled

the solution becomes less concentrated the longer it is boiled

When some salt is dissolved in plenty of water, which statement is most likely TRUE about the resulting solution? [8f-16]

the boiling point is lower than pure water

the freezing point is higher than pure water

the boiling point decreases the longer the solution is boiled

the solution becomes more concentrated the longer it is boiled

Which order of the three words matches the three substances iron, iron oxide, steel ?, ?, ? [8f-17]

element, compound, mixture

compound, element, mixture

mixture, compound, element

element, mixture, compound

Which order of the three words matches the three substances salt, sodium, seawater ?, ?, ? [8f-18]

element, compound, mixture

compound, element, mixture

mixture, compound, element

element, mixture, compound

Which order of the three words matches the three substances brass, copper oxide, zinc ?, ?, ? [8f-19]

element, compound, mixture

compound, element, mixture

mixture, compound, element

element, mixture, compound

Which order of the three words matches the three substances hydrogen, petrol, water ?, ?, ? [8f-20]

element, compound, mixture

compound, element, mixture

mixture, compound, element

element, mixture, compound

Which order of the three words matches the three substances carbon dioxide, coal, carbon ?, ?, ? [8f-21]

compound, mixture, element

mixture, compound, element

element, mixture, compound

compound, element, mixture

Which order of the three words matches the three substances plaster of Paris, gypsum, flowers of
sulfur ?, ?, ? [8f-22]

compound, mixture, element

mixture, compound, element

element, mixture, compound

compound, element, mixture

Which order of the three words matches the three substances chlorine, rock salt, sodium chloride ?, ?, ? [8f-23]

compound, mixture, element

mixture, compound, element

element, mixture, compound

compound, element, mixture

Which order of the three words matches the three substances sodium hydroxide, oxygen, bleach ?, ?, ? [8f-24]

compound, mixture, element

mixture, compound, element

element, mixture, compound

compound, element, mixture

Which two words apply to the substance nitrogen? [8f-25]

gas, element

liquid, compound

solid, mixture

gas, compound

Which two words apply to the substance copper
sulfate? [8f-26]

gas, element

solid, compound

solid, mixture

gas, compound

Which two words apply to the substance wood? [8f-27]

gas, element

solid, compound

solid, mixture

gas, compound

Which two words apply to the substance
sulfur dioxide? [8f-28]

gas, element

solid, compound

solid, mixture

gas, compound

Which two words apply to the substance vinegar? [8f-29]

liquid, mixture

solid, element

gas, mixture

liquid, element

Which two words apply to the substance magnesium? [8f-30]

liquid, mixture

solid, element

gas, mixture

liquid, element

Which two words apply to the substance air? [8f-31]

liquid, mixture

solid, element

gas, mixture

liquid, element

Which two words apply to the substance mercury? [8f-32]

liquid, mixture

solid, element

gas, mixture

liquid, element

Silvery grey iron filings are added to yellow
sulfur powder in a test tube. The contents of the test tube were strongly heated until they glowed red without further heating to form a dark grey dull solid. Which statement is TRUE about the contents of the test tube in the experiment? [8f-33]

at the start they are a mixture

at the end they are a mixture

at the start they cannot be separated with a magnet

at the end they can be separated with a magnet

Silvery grey iron filings are added to yellow
sulfur powder in a test tube. The contents of the test tube were strongly heated until they glowed red without further heating to form a dark grey dull solid. Which statement is TRUE about the contents of the test tube in the experiment? [8f-34]

at the start they are a compound

at the end they are a compound

at the start they cannot be separated with a magnet

at the end they can be separated with a magnet

Silvery grey iron filings are added to yellow
sulfur powder in a test tube. The contents of the test tube were strongly heated until they glowed red without further heating to form a dark grey dull solid. Which statement is TRUE about the contents of the test tube in the experiment? [8f-35]

at the start they are a compound

at the end they are a mixture

at the start they can be separated with a magnet

at the end they can be separated with a magnet

Silvery grey iron filings are added to yellow
sulfur powder in a test tube. The contents of the test tube were strongly heated until they glowed red without further heating to form a dark grey dull solid. Which statement is TRUE about the contents of the test tube in the experiment? [8f-36]

at the start they are a compound

at the end they are a mixture

at the start they cannot be separated with a magnet

at the end they cannot be separated with a magnet

Silvery grey iron filings are added to yellow
sulfur powder in a test tube. The contents of the test tube were strongly heated until they glowed red without further heating to form a dark grey dull solid. Which statement is TRUE about the contents of the test tube in the experiment? [8f-37]

the colour change suggests a chemical reaction has happened overall

FeS describes them at the start, Fe + S describes them at the end

at the start, acid will act on the iron forming hydrogen and the same gas is formed with acid and the dark-grey solid product

the red glow without heating shows overall a physical change has happened to the mixture when cool

Silvery grey iron filings are added to yellow
sulfur powder in a test tube. The contents of the test tube were strongly heated until they glowed red without further heating to form a dark grey dull solid. Which statement is TRUE about the contents of the test tube in the experiment? [8f-38]

the colour change suggests a physical change has happened overall

Fe + S describes them at the start, FeS describes them at the end

at the start, acid will act on the iron forming hydrogen and the same gas is formed with acid and the dark-grey solid product

the red glow without heating shows overall a physical change has happened to the mixture when cool

Silvery grey iron filings are added to yellow
sulfur powder in a test tube. The contents of the test tube were strongly heated until they glowed red without further heating to form a dark grey dull solid. Which statement is TRUE about the contents of the test tube in the experiment? [8f-39]

the colour change suggests a physical change has happened overall

FeS describes them at the start, Fe + S describes them at the end

at the start, acid will act on the iron forming hydrogen and hydrogen
sulfide gas is formed with acid and the dark-grey solid product

the red glow without heating shows overall a physical change has happened to the mixture when cool

Silvery grey iron filings are added to yellow
sulfur powder in a test tube. The contents of the test tube were strongly heated until they glowed red without further heating to form a dark grey dull solid. Which statement is TRUE about the contents of the test tube in the experiment? [8f-40]

the colour change suggests a physical change has happened overall

FeS describes them at the start, Fe + S describes them at the end

at the start, acid will act on the iron forming hydrogen and the same gas is formed with acid and the dark-grey solid product

the red glow without heating suggests overall a chemical change has happened to the mixture when cool

Which method of separation is best to use for separating petrol from crude oil? [8f-41]

distillation

evaporation

filtration

chromatography

Which method of separation is best to use for obtaining salt from seawater? [8f-42]

distillation

evaporation

filtration

chromatography

Which method of separation is best to use for removing silt from muddy water? [8f-43]

distillation

evaporation

filtration

chromatography

Which method of separation is best to use for investigating the composition of food dyes in sweet colours? [8f-44]

distillation

evaporation

filtration

chromatography

Which method of separation is best to use for purifying water containing small quantities of dissolved minerals? [8f-45]

distillation

evaporation

filtration

chromatography

Which method of separation is best to use for obtaining fertiliser crystals from neutralising nitric acid solution with the alkali ammonia? [8f-46]

distillation

evaporation

filtration

chromatography

Which method of separation is best to use for separating a solid product* formed from mixing two solutions? (* called a precipitate) [8f-47]

distillation

evaporation

filtration

chromatography

Which method of separation is best to use for checking which ink was used in a forged cheque? [8f-48]

distillation

evaporation

filtration

chromatography

Which particle is a compound made up of three elements? [8f-49]

8

2

4

7

Which particle is a compound made up of three elements? [8f-50]

2

9

4

7

Which particle is an element made up of single atoms? [8f-51]

1

6

3

5

Which particle is a compound made up of two elements? [8f-52]

3

5

6

1

Which particle is a compound made up of two elements? [8f-53]

7

8

6

3

Which particle is a molecule made of 4 atoms? [8f-54]

7

6

8

2

Which particle is formed when two different colourless gases chemically combine? [8f-55]

7

6

4

2

Which particle is formed when a black solid and a colourless gas chemically combine? [8f-56]

Given the following symbol equation:CaCO3(s) ==> CaO(s) + CO2(g)Calculate how many g of carbon dioxide is formed if 25g of calcium carbonate is decomposed on heating to form 14g of calcium oxide.(Relative atomic masses, Ar: Ca = 40, C = 12 and O = 16) [com-4]

Given the symbol equation to show the formation of iron
sulfide:Fe + S ==> FeSCalculate the mass in g of iron sulfide formed when 5.6g of iron combines with 3.2g of
sulfur.(Relative atomic masses, Ar: Fe = 56 and S = 32) [com-5]

Given the symbol equation to show the formation of iron
sulfide:Fe + S ==> FeSCalculate the mass in g of iron sulfide formed when 28g of iron combines with 16g of
sulfur.(Relative atomic masses, Ar: Fe = 56 and S = 32) [com-6]

Given the symbol equation to show the formation of calcium chloride by burning calcium in chlorine:Ca(s) + Cl2(g) ==> CaCl2(s)Calculate the mass in g of calcium chloride formed when 20g of calcium combines with 35.5g of chlorine.(Relative atomic masses, Ar: Ca = 40 and Cl = 35.5) [com-7]

Given the symbol equation to show the formation of calcium chloride by burning calcium in chlorine:Ca(s) + Cl2(g) ==> CaCl2(s)Calculate the mass in g of chlorine needed when 40g of calcium forms 111g of calcium chloride.(Relative atomic masses, Ar: Ca = 40 and Cl = 35.5) [com-8]

Given the symbol equation to show the formation of aluminium
sulfide by heating a mixture of aluminium and sulfur:2Al + 3S ==> Al2S3How many g of
sulfur is needed if 54g of aluminium is reacted to form 150g of aluminium
sulfide?(Relative atomic masses, Ar: Al = 27 and S = 32) [com-9]

Given the symbol equation to show the formation of aluminium
sulfide by heating a mixture of aluminium and sulfur:2Al + 3S ==> Al2S3How many kg of
sulfur is needed if 108kg of aluminium is reacted to form 300kg of aluminium
sulfide?(Relative atomic masses, Ar: Al = 27 and S = 32) [com-10]

Given the symbol equation to show the formation of iron
sulfide by heating a mixture of iron and sulfur:Fe + S ==> FeSCalculate the mass in g of iron unreacted when 60g of iron reacts with 32g of
sulfur to form 88g of iron sulfide.(Relative atomic masses, Ar: Fe = 56 and S = 32) [com-11]

Given the symbol equation to show the formation of iron
sulfide by heating a mixture of iron and sulfur:Fe + S ==> FeSCalculate the mass in g of
sulfur unreacted when 28g of iron reacts with 22g of sulfur to form 44g of iron
sulfide.(Relative atomic masses, Ar: Fe = 56 and S = 32) [com-12]

Given the symbol equation to show the formation of calcium chloride by burning calcium in chlorine:Ca(s) + Cl2(g) ==> CaCl2(s)Calculate the mass in g of calcium left unreacted when 25g of calcium reacts with 35.5g of chlorine.(Relative atomic masses, Ar: Ca = 40 and Cl = 35.5) [com-13]

Given the symbol equation to show the formation of calcium chloride by burning calcium in chlorine:Ca(s) + Cl2(g) ==> CaCl2(s)Calculate the mass in g of chlorine left unreacted when 80g of calcium reacts with 150g of chlorine to form 222g of calcium chloride.(Relative atomic masses, Ar: Ca = 40 and Cl = 35.5) [com-14]

How many moles of iron are there in 2.8g? (atomic mass Fe = 56) [mam-1]

How many moles of
sulfur are there in 64g? (atomic mass S = 32) [mam-2]

How many moles of sodium are there in 115g? (atomic mass Na = 23) [mam-3]

How many moles of carbon are there in 3g? (atomic mass C = 12 ) [mam-4]

How many moles of zinc are there in 1.625g? (atomic mass Zn = 65) [mam-5]

How many moles of iodine are there in 12.7g of I2? (atomic mass I = 127) [mam-6]

How many moles of chlorine are there in 213g of Cl2? (atomic mass Cl = 35.5) [mam-7]

How many moles of bromine are there in 6.4g of Br2? (atomic mass Br = 80) [mam-8]

How many moles of phosphorus are there in 24.8g of P4? (atomic mass P = 31) [mam-9]

How many moles of oxygen are there in 128g of O2? (atomic mass O = 16) [mam-10]

How many moles of water are there in 4.5g of H2O? (atomic masses: H = 1, O = 16) [mam-11]

How many moles of methane are there in 112g of CH4? (atomic masses: C = 12, H = 1) [mam-12]

Iron
sulfide can be made by heating an iron and sulfur mixture.Fe(s) + S(s) ==> FeS(s)Given the atomic masses: Fe = 56, S = 32, how many g of iron
sulfide can be made from 14g of iron? [rmc-4]

Iron
sulfide can be made by heating an iron and sulfur mixture.Fe(s) + S(s) ==> FeS(s)Given the atomic masses: Fe = 56, S = 32, how many g of
sulfur reacts with 224g of iron? [rmc-5]

Iron
sulfide can be made by heating an iron and sulfur mixture.Fe(s) + S(s) ==> FeS(s)Given the atomic masses: Fe = 56, S = 32, how many g of iron is needed to make 440g of iron
sulfide? [rmc-6]

The iron ore Haematite consists mainly of iron(III) oxide. In a blast furnace it is reduced to iron with carbon monoxide ...Fe2O3(s) + 3CO(g) ==> 2Fe(l) + 3CO2(g)Given the atomic masses: Fe = 56, O =16, C=12, how many tonne of iron can be made from 40 tonnes of haematite ore? [rmc-7]

The iron ore Haematite consists mainly of iron(III) oxide. In a blast furnace it is reduced to iron with carbon monoxide ...Fe2O3(s) + 3CO(g) ==> 2Fe(l) + 3CO2(g)Given the atomic masses: Fe = 56, O =16, C=12, how many tonne of haematite ore are needed to make 224 tonne of iron? [rmc-8]